Title: Senior Test Engineer, ESS  

About the Company:  

Peak Energy is the first American venture to advance globally proven Sodium-Ion battery systems as the storage standard for the new era of renewable energy on a resilient grid.   

Sodium-Ion is cheap, readily available and safe, making it the leading contender in a rapidly evolving market.     

Our leadership team is powered by decades of expertise in scaling gigawatt-level innovation at world-class companies such as Tesla, Northvolt, SunPower, Fluence, and Enovix. We are backed by strategic investment and product partners such as TDK Ventures and Eclipse Ventures.    

We are a team of engineers, operators, entrepreneurs, and partners driven by a shared ambition to set the new performance standard for renewable energy and grid resilience.   

About the Job: 

We are looking for a Senior Test Engineer to support our testing and functional verification efforts for our energy storage systems, from battery to power electronics. This role will work closely with design and simulation teams to understand risks, develop procedures, set up, run, and ultimately report on appropriate tests. Through risk analysis, testing, and data analysis/reporting, you will play a key role in informing the design direction of the product. This person is a self-starter who is hungry for knowledge and holds themselves and others to high standards.   

Responsibilities: 

• Lead and conduct comprehensive testing of functional, thermal, electrical (HV/LV) and mechanical systems across our energy storage product  

• Develop test strategies, plans, and procedures to understand and evaluate key risks against performance, reliability, abuse/safety, and functional requirements 

• Spearhead the design and acquisition of testing equipment and infrastructure  

• Collaborate with engineering teams to ensure design integrity and improvements.  

• Analyze complex test data, report findings, and drive system enhancements.  

• Identify, diagnose, and resolve intricate technical issues during testing.  
• Perform root cause analysis on system failures and develop corrective and preventive actions to address identified issues. 
• Drive innovation in testing methodologies and practices.  

• Interface tightly with design, simulation and manufacturing engineering partners to inform design decisions  

• Maintain detailed records of tests, analyses, and corrective actions. Prepare reports and presentations for internal and external stakeholders.  

• Drive and participate in a culture of rapid prototyping and automation 

• A great team spirit and get-it-done attitude. No job is too big or too small.  

Minimum Qualifications:  

• Bachelor’s degree in Mechanical Engineering, Electrical Engineering, Aerospace Engineering, or a related field.   

• 1-4+ years of experience in test engineering, preferably within the battery storage or renewable energy sectors. Includes relevant internships & student group projects. 

• Strong understanding of electromechanical engineering first principles  

• Proficiency in data processing & analysis tools 

• Excellent problem-solving skills, with the ability to think critically and act decisively.  

• Strong communication skills, with the ability to present complex technical information clearly to both technical and non-technical stakeholders.  

• Ability to work collaboratively in a fast-paced, dynamic environment. 

• Proactive ownership mindset with a strong sense of accountability. 

The salary range for this role is $150,000 - $200,000, with actual pay varying based on work location, experience, and skills. Our competitive benefits package includes flexible time off, comprehensive medical, dental, and vision coverage, a strong 401(k) plan, and equity opportunities. Join us to thrive in a supportive environment while making a meaningful impact in the energy sector! 

At Peak Energy Technologies Inc., we believe that a diverse and inclusive workplace makes us a more capable, innovative, and competitive company. We welcome people who represent diversity in their backgrounds, ethnicities, cultures, and experiences. Peak Energy Technologies Inc. is an equal opportunity employer, aiming to reach our company’s full potential by cultivating an inclusive workforce. We do not discriminate on the basis of race, color, ancestry, religion, national origin, sexual orientation, citizenship, marital or family status, disability, gender identity or expression, veteran status, or any other legally protected status.

About this Job

Peak Energy is looking for a talented Systems Engineer to play a central role in the development and launch of Peak battery energy storage systems. This role influences all aspects of product development including design, modeling, integration and testing, manufacturing, and operation in the field. The Systems Engineer ensures that both the design and the final, assembled product meet the company and customer needs. This position is highly collaborative, requires strong technical and personal skills, and has an immense impact on the success of the product. The ideal candidate has strong battery and engineering fundamentals, excellent communication skills, and a deep dedication to Peak’s mission.

Roles and Responsibilities

• Define and manage system and subsystem requirements for Peak’s battery energy storage system products
• Develop and own system-level budgets, decomposing top-level requirements into subsystem allocations
• Create and oversee verification of requirements including determining test plans, analyzing and reviewing results, providing the final say on the outcome of the verification
• Drive future architecture changes, evaluate tradeoffs on, and lead cross-functional decision-making efforts
• Support and mentor fellow engineers by communicating system-level impacts to inform and improve their designs
• Act as the subject matter expert for customer-facing documents such as service and operation manuals and technical reports
• Support UL, NFPA, and UN compliance efforts, providing technical expertise and guidance

Minimum Qualifications

• Bachelor’s degree in Mechanical Engineering, Electrical Engineering, or a related discipline
• 5+ years working with high voltage electrical systems
• Mastery of electrical, thermal, and mechanical fundamentals
• Knowledge of systems engineering fundamentals (requirement decomposition, verification and validation, interface management)
• Strong analysis tool skills (e.g. Excel, Python, MATLAB)
• Experience evaluating complex, multi-disciplinary tradeoffs and driving cross-functional decision making
• Excellent organization and proficiency at creating robust and informative documentation
• Cross-functional project management experience
• Excellent communication, collaboration, and conflict resolution skills
• Passion for renewable energy, sustainability, and driving positive environmental impact through technology innovation

Preferred Qualifications

• Experience with high voltage battery systems
• Product design experience with high-volume products
• Experience with a requirements management tool (e.g. Jama, Polarion, Flow)
• Proficiency with Jira for task tracking and documentation

Peak Energy Core Values 

• Speed Through Focus: Prioritize what matters most and execute quickly without distractions. 

• Mission Over Self: Put the company's mission and team success ahead of individual interests. 

• Face the Brutal Truth: Embrace honesty, even when it’s uncomfortable, to make informed decisions. 

• Be a Good Person: Treat everyone with respect and integrity, fostering a positive and ethical work environment. 

The salary range for this role is $170,000 - $200,000, with actual pay varying based on work location, experience, and skills. Our competitive benefits package includes flexible time off, comprehensive medical, dental, and vision coverage, a strong 401(k) plan, and equity opportunities. Join us to thrive in a supportive environment while making a meaningful impact in the energy sector! 

At Peak Energy Technologies Inc., we believe that a diverse and inclusive workplace makes us a more capable, innovative, and competitive company. We welcome people who represent diversity in their backgrounds, ethnicities, cultures, and experiences. Peak Energy Technologies Inc. is an equal opportunity employer, aiming to reach our company’s full potential by cultivating an inclusive workforce. We do not discriminate on the basis of race, color, ancestry, religion, national origin, sexual orientation, citizenship, marital or family status, disability, gender identity or expression, veteran status, or any other legally protected status.

About the Company:

Peak Energy is the first American venture to advance globally proven Sodium-Ion battery systems as the storage standard for the new era of renewable energy on a resilient grid. 

Sodium-Ion is cheap, readily available and safe, making it the leading contender in a rapidly evolving market.   

Our leadership team is powered by decades of expertise in scaling gigawatt-level innovation at world-class companies such as Tesla, Northvolt, SunPower, Fluence, and Enovix. We are backed by strategic investment and product partners such as TDK Ventures and Eclipse Ventures.  

We are a team of engineers, operators, entrepreneurs, and partners driven by a shared ambition to set the new performance standard for renewable energy and grid resilience. 

About the Job: 

Peak Energy is looking for a Staff Thermal Analyst – ESS, to support the development of our gigawatt scale energy storge system. This person will be a primary contributor in thermal design decisions, from architecture to optimization to validation. They will work design and manufacturing partners, along with external partners, to provide engineering trades and guidance. This person has strong fundamentals while bringing a practical and can-do attitude to the role.  

Responsibilities:  

Thermal Analysis  

• Perform detailed thermal analysis of storage systems, including transient and steady-state heat transfer simulations. 

• Develop thermal management strategies to optimize system performance 

• Collaborate with design engineers to integrate thermal management solutions into overall system design. 

• Propose design modifications to enhance thermal performance. 

Simulation and Modeling

• Develop and validate simulation models for thermal analysis. 

• Utilize advanced computational tools and techniques, such as finite element analysis (FEA) and computational fluid dynamics (CFD). 

Testing and Validation

• Design and oversee experimental tests to validate models and predictions. 

• Analyze test data and incorporate findings into design improvements. 

Collaboration and Communication  

• Work closely with cross-functional teams, including R&D, manufacturing, and quality assurance. 

• Present analysis results and recommendations to technical and non-technical stakeholders. 

• Drive and participate in a culture of rapid protoyping and testing 

• A great team spirit and get-it-done attitude. No job is too big or too small.   

Minimum Qualifications: 

• Bachelor's degree in a field related to thermal engineering  

• 5+ years of experience working with 3D thermal simulations  

• Proficiency in simulation software such as Star-CCM+ or COMSOL 

• Passion for renewable energy, sustainability, and driving positive environmental impact through technology innovations.   

• Eligible to work in the U.S.  

Preferred Qualifications: 

• Experience working with large scale battery storage systems 

• Experience with hands on testing and model validation 

• Experience with cell modeling 

Peak Energy Core Values 

• Speed Through Focus: Prioritize what matters most and execute quickly without distractions.
• Mission Over Self: Put the company's mission and team success ahead of individual interests.
• Face the Brutal Truth: Embrace honesty, even when it’s uncomfortable, to make informed decisions.
• Be a Good Person: Treat everyone with respect and integrity, fostering a positive and ethical work environment. 

The salary range for this role is $170,000 - $240,000, with actual pay varying based on work location, experience, and skills. Our competitive benefits package includes flexible time off, comprehensive medical, dental, and vision coverage, a strong 401(k) plan, and equity opportunities. Join us to thrive in a supportive environment while making a meaningful impact in the energy sector! 

At Peak Energy Technologies Inc., we believe that a diverse and inclusive workplace makes us a more capable, innovative, and competitive company. We welcome people who represent diversity in their backgrounds, ethnicities, cultures, and experiences. Peak Energy Technologies Inc. is an equal opportunity employer, aiming to reach our company’s full potential by cultivating an inclusive workforce. We do not discriminate on the basis of race, color, ancestry, religion, national origin, sexual orientation, citizenship, marital or family status, disability, gender identity or expression, veteran status, or any other legally protected status.

Job Title: Functional Systems Lead 

Location: Burlingame, CA

Department: ESS Engineering

Reports to: CTO

Position Type: Full Time

About the Company

Peak Energy is the first American venture to advance globally proven Sodium-Ion battery systems as the storage standard for the new era of renewable energy on a resilient grid. Sodium-Ion is cheap, readily available and safe, making it the leading contender in a rapidly evolving market.  

Our leadership team is powered by decades of expertise in scaling gigawatt-level innovation at world-class companies such as Tesla, Northvolt, SunPower, Fluence, and Enovix. We are backed by strategic investment and product partners such as TDK Ventures and Eclipse Ventures.  

About the Job:

Peak Energy is seeking a Functional Systems Lead to own system-level architecture, requirements, and integration across embedded software, electrical systems, and controls for our energy storage products. 

This role sits at the intersection of embedded systems, electrical engineering, and system modeling, ensuring our products are safe, reliable, and performant from cell to grid. 

You will lead the definition of functional requirements, system behavior, and safety architecture, while partnering closely with embedded, hardware, and modeling teams—and may directly oversee embedded software development for safety-critical functions. 

This is a highly cross-functional, hands-on leadership role ideal for someone who thrives in ambiguity and wants to shape both product and engineering direction. 

Responsibilities:

• Own system-level architecture and functional definition for energy storage systems (BMS, controls, protections, EMS integration)  

• Define and manage system requirements, interfaces, and traceability from cell → module → pack → system → grid  

• Lead functional safety architecture, including fault detection, diagnostics, and protection strategies  

• Drive systems integration across embedded software, power electronics, thermal, and mechanical subsystems  

• Partner with embedded teams to guide development of real-time, safety-critical firmware (controls, protections, communication)  

• Develop and validate system models (performance, thermal, electrical behavior, fault conditions) to inform design decisions  

• Lead verification & validation strategy (DV/PV), including test definition, coverage, and requirements validation  

• Support certification efforts (UL, IEC, IEEE), ensuring compliance at the system level  

• Identify system risks and drive DFMEA, fault analysis, and mitigation strategies  

• Build and mentor a high-performing systems/embedded team, setting clear ownership and technical direction  

Minimum Qualifications:

• 10+ years of experience in systems engineering, embedded systems, or electrical engineering, with 3–5+ years in technical leadership  

• Strong background in safety-critical systems (battery systems, automotive, aerospace, industrial, or similar)  

• Experience defining and managing system requirements, interfaces, and architecture  

• Deep understanding of embedded systems and real-time controls  

• Familiarity with electrical systems (power electronics, battery systems, sensing, protections)  

• Experience with system modeling and simulation (MATLAB/Simulink, Python, or similar)  

• Strong experience with DFMEA, fault handling, and system reliability engineering  

• Experience driving cross-functional integration across hardware, software, and systems teams  

• Excellent communication skills and ability to operate across multiple technical domains  

• Bachelor’s, Master’s, or PhD in Electrical Engineering, Mechanical Engineering, Computer Engineering, or related field  

Preferred Qualifications:

• Experience with battery management systems (BMS) or energy storage systems  

• Background in functional safety standards (ISO 26262, IEC 61508, UL 9540, etc.)  

• Experience leading or mentoring embedded software teams  

• Familiarity with grid-scale energy systems, EMS, or power systems integration  
• Experience in startup or high-growth environments

Compensation and Benefits

The salary range for this role is $150k- $225k, with actual pay varying based on work location, experience, and skills. Our competitive benefits package includes flexible time off, comprehensive medical, dental, and vision coverage, a strong 401(k) plan, and equity opportunities. Join us to thrive in a supportive environment while making a meaningful impact in the energy sector!

About the Company:

Peak Energy is the first American venture to advance globally proven Sodium-Ion battery systems as the storage standard for the new era of renewable energy on a resilient grid. 

Sodium-Ion is cheap, readily available and safe, making it the leading contender in a rapidly evolving market.   

Our leadership team is powered by decades of expertise in scaling gigawatt-level innovation at world-class companies such as Tesla, Northvolt, SunPower, Fluence, and Enovix. We are backed by strategic investment and product partners such as TDK Ventures and Eclipse Ventures.  

We are a team of engineers, operators, entrepreneurs, and partners driven by a shared ambition to set the new performance standard for renewable energy and grid resilience. 

About the Job:

Peak Energy is looking for a Systems Modeling Engineer to join our Energy Storage Systems (ESS) team and work at the forefront of the development of our gigawatt scale energy storage systems. This role will leverage expertise to drive major thermal and electrical architectural decisions and dive deep into key electrical and battery component simulation. This role must explore broadly and dive deeply. With a drive for rigorous optimization, meticulous documentation and clear communication of findings, you will work closely with design, test, validation, manufacturing engineering and leadership to navigate our products’ development. This person is a self-starter who is hungry for knowledge and holds themselves and others to high standards.   

Responsibilities: 

• Define system and component design direction and requirements by developing detailed models of battery energy storage systems across operating modes and external conditions, including battery modules and power electronic components. 
• Identify key performance indicators and optimize system design to enhance these metrics. 
• Validate models with experimental data and refine them based on test results. 
• Tireless exploration, both broadly and deeply, and clear communication of assumptions, inputs and findings. 
• Define and spearhead selection and development of tools, infrastructure and design practices. 
• Interface tightly with design, test, validation and manufacturing engineering partners to inform design decisions. 
• Drive and participate in a culture of rapid prototyping and testing. 
• A great team spirit and get-it-done attitude. No job is too big or too small.  

Minimum Qualifications:

• Bachelors or Masters degree in Mechanical, Electrical, Systems Engineering or related field. 
• 5-10 years of experience working with power systems (non-academic)
• Experience with equivalent circuit models
• Strong electrical and thermal engineering fundamentals. 
• Extensive use of MATLAB/Simulink or Python.  
• Familiarity with high voltage battery systems or power electronics. 
• Experience with design and manufacturing of medium to high volume products.  
• Hands on prototyping, validation and testing experience. 
• Passion for renewable energy, sustainability, and driving positive environmental impact through technology innovation. 
• Eligible to work in the U.S. 

Preferred Qualifications: 

• High voltage battery and power electronics experience. 
• Utility-scale energy storage systems experience. 
• Supervisory control simulation experience. 

Peak Energy Core Values 

• Speed Through Focus: Prioritize what matters most and execute quickly without distractions. 

• Mission Over Self: Put the company's mission and team success ahead of individual interests. 

• Face the Brutal Truth: Embrace honesty, even when it’s uncomfortable, to make informed decisions. 

• Be a Good Person: Treat everyone with respect and integrity, fostering a positive and ethical work environment. 

At Peak Energy Technologies Inc., we believe that a diverse and inclusive workplace makes us a more capable, innovative, and competitive company. We welcome people who represent diversity in their backgrounds, ethnicities, cultures, and experiences. Peak Energy Technologies Inc. is an equal opportunity employer, aiming to reach our company’s full potential by cultivating an inclusive workforce. We do not discriminate on the basis of race, color, ancestry, religion, national origin, sexual orientation, citizenship, marital or family status, disability, gender identity or expression, veteran status, or any other legally protected status.

The salary range for this role is $170,000 - $205,000, with actual pay varying based on work location, experience, and skills. Our competitive benefits package includes flexible time off, comprehensive medical, dental, and vision coverage, a strong 401(k) plan, and equity opportunities. Join us to thrive in a supportive environment while making a meaningful impact in the energy sector! 

About the Job: 

We are looking for a Test Engineer Intern to lead our testing and functional verification efforts for our energy storage systems, from battery to power electronics. This role will work closely with design and simulation teams to understand needs, develop procedures, set up and run and ultimately report on appropriate tests. Through testing, you will play a key role in informing the design direction of the product. This person is a self-starter who is hungry for knowledge and holds themselves and others to high standards.  Candidates should be available to begin employment in Fall 2026.

Responsibilities: 

• Conduct comprehensive testing of functional, high voltage, thermal, and mechanical systems across our energy storage product  

• Develop test strategies, plans, and procedures to evaluate key risks 

• Spearhead the design and acquisition of testing infrastructure  

• Collaborate with engineering teams to ensure design integrity and improvements.  

• Analyze complex test data, report findings, and drive system enhancements.  

• Identify, diagnose, and resolve intricate technical issues during testing.  

• Perform root cause analysis on system failures and develop corrective and preventive actions to address identified issues. 

• Drive innovation in testing methodologies and practices.  

• Interface tightly with design, simulation and manufacturing engineering partners to inform design decisions  

• Maintain detailed records of tests, analyses, and corrective actions. Prepare reports and presentations for internal and external stakeholders.  

• Drive and participate in a culture of rapid prototyping and automation 

• A great team spirit and get-it-done attitude. No job is too big or too small.  

Minimum Qualifications:  

• Working towards a Bachelor’s degree in Mechanical Engineering, Electrical Engineering, Aerospace Engineering, or a related field.   

• Experience in test engineering, preferably within the battery storage or renewable energy sectors 

• Strong understanding of electromechanical engineering first principles  

• Proficiency in data processing & analysis tools 

• Excellent problem-solving skills, with the ability to think critically and act decisively.  

• Strong communication skills, with the ability to present complex technical information clearly to both technical and non-technical stakeholders.  

• Ability to work collaboratively in a fast-paced, dynamic environment. 
• Proactive ownership mindset with a strong sense of accountability. 
  
  

We encourage candidates to apply even if you don’t meet every qualification listed. We value diverse experiences and perspectives, and you may be a great fit for this role or others.

Peak Energy Core Values 

• Speed Through Focus: Prioritize what matters most and execute quickly without distractions. 

• Mission Over Self: Put the company's mission and team success ahead of individual interests. 

• Face the Brutal Truth: Embrace honesty, even when it’s uncomfortable, to make informed decisions. 

• Be a Good Person: Treat everyone with respect and integrity, fostering a positive and ethical work environment. 

The pay for this role is $30/hr.  Our competitive benefits package includes flexible PTO, comprehensive medical, dental, and vision coverage, a strong 401(k) plan, and equity opportunities. Join us to thrive in a supportive environment while making a meaningful impact in the energy sector! 

At Peak Energy Technologies Inc., we believe that a diverse and inclusive workplace makes us a more capable, innovative, and competitive company. We welcome people who represent diversity in their backgrounds, ethnicities, cultures, and experiences. Peak Energy Technologies Inc. is an equal opportunity employer, aiming to reach our company’s full potential by cultivating an inclusive workforce. We do not discriminate on the basis of race, color, ancestry, religion, national origin, sexual orientation, citizenship, marital or family status, disability, gender identity or expression, veteran status, or any other legally protected status.

At Peak Energy Technologies Inc., we believe that a diverse and inclusive workplace makes us a more capable, innovative, and competitive company. We welcome people who represent diversity in their backgrounds, ethnicities, cultures, and experiences. Peak Energy Technologies Inc. is an equal opportunity employer, aiming to reach our company’s full potential by cultivating an inclusive workforce. We do not discriminate on the basis of race, color, ancestry, religion, national origin, sexual orientation, citizenship, marital or family status, disability, gender identity or expression, veteran status, or any other legally protected status.

About the Company:

Peak Energy is the first American venture to advance globally proven Sodium-Ion battery systems as the storage standard for the new era of renewable energy on a resilient grid. 

Sodium-Ion is cheap, readily available and safe, making it the leading contender in a rapidly evolving market.   

Our leadership team is powered by decades of expertise in scaling gigawatt-level innovation at world-class companies such as Tesla, Northvolt, SunPower, Fluence, and Enovix. We are backed by strategic investment and product partners such as TDK Ventures and Eclipse Ventures.  

We are a team of engineers, operators, entrepreneurs, and partners driven by a shared ambition to set the new performance standard for renewable energy and grid resilience. 

Title: Staff Test Engineer, ESS 

About the Company:  

Peak Energy is the first American venture to advance globally proven Sodium-Ion battery systems as the storage standard for the new era of renewable energy on a resilient grid.   

Sodium-Ion is cheap, readily available and safe, making it the leading contender in a rapidly evolving market.     

Our leadership team is powered by decades of expertise in scaling gigawatt-level innovation at world-class companies such as Tesla, Northvolt, SunPower, Fluence, and Enovix. We are backed by strategic investment and product partners such as TDK Ventures and Eclipse Ventures.    

We are a team of engineers, operators, entrepreneurs, and partners driven by a shared ambition to set the new performance standard for renewable energy and grid resilience.   

About the Job: 

We are looking for a Staff Test Engineer to support our testing and functional verification efforts for our energy storage systems, from battery to power electronics. This role will work closely with design and simulation teams to understand risks, develop procedures, set up, run, and ultimately report on appropriate tests. Through risk analysis, testing, and data analysis/reporting, you will play a key role in informing the design direction of the product. This person is a self-starter who is hungry for knowledge and holds themselves and others to high standards.   

Responsibilities: 

• Lead and conduct comprehensive testing of functional, thermal, electrical (HV/LV) and mechanical systems across our energy storage product  

• Develop test strategies, plans, and procedures to understand and evaluate key risks against performance, reliability, abuse/safety, and functional requirements 

• Spearhead the design and acquisition of testing equipment and infrastructure  

• Collaborate with engineering teams to ensure design integrity and improvements.  

• Analyze complex test data, report findings, and drive system enhancements.  

• Identify, diagnose, and resolve intricate technical issues during testing.  

• Perform root cause analysis on system failures and develop corrective and preventive actions to address identified issues. 

• Mentor junior engineers and contribute to team skill enhancement.  

• Drive innovation in testing methodologies and practices.  

• Interface tightly with design, simulation and manufacturing engineering partners to inform design decisions  

• Maintain detailed records of tests, analyses, and corrective actions. Prepare reports and presentations for internal and external stakeholders.  

• Drive and participate in a culture of rapid prototyping and automation 

• A great team spirit and get-it-done attitude. No job is too big or too small.  

Minimum Qualifications:  

• Bachelor’s degree in Mechanical Engineering, Electrical Engineering, Aerospace Engineering, or a related field.   

• 5+ years of experience in test engineering, preferably within the battery storage or renewable energy sectors. Includes relevant internships & student group projects. 

• Strong understanding of electromechanical engineering first principles  

• Proficiency in data processing & analysis tools 

• Excellent problem-solving skills, with the ability to think critically and act decisively.  

• Strong communication skills, with the ability to present complex technical information clearly to both technical and non-technical stakeholders.  

• Ability to work collaboratively in a fast-paced, dynamic environment. 

• Proactive ownership mindset with a strong sense of accountability. 

The salary range for this role is $180,000 - $230,000, with actual pay varying based on work location, experience, and skills. Our competitive benefits package includes flexible time off, comprehensive medical, dental, and vision coverage, a strong 401(k) plan, and equity opportunities. Join us to thrive in a supportive environment while making a meaningful impact in the energy sector! 

At Peak Energy Technologies Inc., we believe that a diverse and inclusive workplace makes us a more capable, innovative, and competitive company. We welcome people who represent diversity in their backgrounds, ethnicities, cultures, and experiences. Peak Energy Technologies Inc. is an equal opportunity employer, aiming to reach our company’s full potential by cultivating an inclusive workforce. We do not discriminate on the basis of race, color, ancestry, religion, national origin, sexual orientation, citizenship, marital or family status, disability, gender identity or expression, veteran status, or any other legally protected status.

Staff Reliability Engineer 

Location: Burlingame, CA (Onsite) 

Department: ESS Engineering 

Position Type: Full-time 

About the Job 

Peak Energy is looking for a Staff Reliability Engineer to help scale ESS hardware reliability with a focus on HV electronics, devices, and power conversion. You will work cross-functionally to realize industry-leading reliability in all aspects of the product life cycle from concept development through field deployment. You will creatively apply reliability expertise in a fast-paced, hands-on environment to make an impact where it matters most whether that’s in design architecture, testing, manufacturing, or field operations.

Responsibilities:

• Take independent DfR ownership for existing subsystem reliability and a lead DfR role for future products. Focus on HV electronics, devices, and power conversion.
• Fully develop reliability test programs (DV, PV, ORT) by leading DFMEA, defining mission profiles, analyzing test acceleration, and specifying test requirements
• Build and contribute to custom Python reliability analysis and modelling tools to automate workflows for life prediction, test design, test/field data, and reporting
• Define reliability requirements and acceptance criteria at key program milestones and clearly communicate risk and reliability confidence to engineering leadership
• Develop physics-of-failure lifetime models and close the loop by performing failure root cause analysis and statistical analyses of test and field reliability data
• Partner with the SIE team and suppliers to verify component quality by overseeing outsourced testing, defining qualification and inspection requirements
• Collaborate across all teams to embed DfR principles into engineering decisions throughout the product cycle. Including early architecture decisions, manufacturing process development, cost-down projects, etc

Minimum Qualifications: 

• Bachelor’s or master’s degree in electrical engineering, mechanical engineering, reliability engineering, materials science, or a related field
• 5+ years of experience in hardware reliability engineering in power electronics, high-voltage systems, or consumer electronics
• Strong understanding of reliability engineering principles - statistics, data analysis, physics-of-failure, lifetime prediction models, accelerated life testing, DFMEA
• Demonstrated ability to independently lead product reliability through multiples stages of development
• Proficiency using statistical analysis tools in Python or equivalent for modelling and data analysis
• Strong documentation and technical communication skills — able to clearly present findings and reliability principles to cross-functional and leadership teams
• Ability to think critically and act decisively to efficiently grow reliability confidence in a fast-paced startup environment

Preferred Qualifications: 

• Direct reliability experience with high voltage batteries, DC-DC converters, inverters, battery management systems, or P-V solar products
• Hands-on experience designing, executing, and reporting complex, electro-mechanical reliability tests (HTHE, PTCE, HTOE, HALT, vibration, corrosion)
• Experience with PCBA failure analysis tools such as SEM and X-ray
• Experience using DOEs, accelerated life testing, and field failure data to develop physics-based models for design margin analysis and lifetime failure prediction

The salary range for this role is $180,000-$230,000 with actual pay varying based on work location, experience, and skills. Our competitive benefits package includes flexible time off, comprehensive medical, dental, and vision coverage, a strong 401(k) plan, and equity opportunities. Join us to thrive in a supportive environment while making a meaningful impact in the energy sector! 

At Peak Energy Technologies Inc., we believe that a diverse and inclusive workplace makes us a more capable, innovative, and competitive company. We welcome people who represent diversity in their backgrounds, ethnicities, cultures, and experiences. Peak Energy Technologies Inc. is an equal opportunity employer, aiming to reach our company’s full potential by cultivating an inclusive workforce. We do not discriminate on the basis of race, color, ancestry, religion, national origin, sexual orientation, citizenship, marital or family status, disability, gender identity or expression, veteran status, or any other legally protected status.

About the Job 

Peak Energy is looking for a Mechanical Design Intern to join our Energy Storage Systems (ESS) team and work on mechanical designs of our utility scale sodium-ion energy storage systems (ESS). You will be supporting mechanical system and component design and will work with other design, analysis, manufacturing and test teams to realize your designs. You are hands-on, highly motivated and excited to learn. 

 Responsibilities: 

• Focus on design areas of need, which may include: module enclosure, adhesives, plastic component design, high current conductors, communications harnessing 

• Interface tightly with partners such as thermal and structural analysts and other design functions to inform design decisions 

• Drive and participate in a culture of rapid prototyping and testing 

• Support validation of Peak products from concept through field deployment 

• Ensure a smooth transition from maturing product to mass production 

• A great team spirit and get-it-done attitude. No job is too big or too small.  

 Minimum Qualifications: 

• Pursuing a mechanical engineering, engineering physics, or equivalent degree 

• Strong grasp mechanical and thermal engineering fundamentals 

• Basic understanding of power electronics and electrical fundamentals 

• Familiarity with 3D CAD software 

• Experience with building prototypes 

• Passion for renewable energy, sustainability, and driving positive environmental impact through technology innovation. 

• Eligible to work in the U.S. 

 Preferred Qualifications: 

• CATIA V6 or Siemens NX experience 

• Familiarity with simulation or analysis tools like MATLAB, FEA, or CFD 

Peak Energy Core Values 

• Speed Through Focus: Prioritize what matters most and execute quickly without distractions. 

• Mission Over Self: Put the company's mission and team success ahead of individual interests. 

• Face the Brutal Truth: Embrace honesty, even when it’s uncomfortable, to make informed decisions. 

• Be a Good Person: Treat everyone with respect and integrity, fostering a positive and ethical work environment. 

The pay for this role is $30/hr. Our competitive benefits package includes flexible time off, comprehensive medical, dental, and vision coverage, a strong 401(k) plan, and equity opportunities. Join us to thrive in a supportive environment while making a meaningful impact in the energy sector! 

At Peak Energy Technologies Inc., we believe that a diverse and inclusive workplace makes us a more capable, innovative, and competitive company. We welcome people who represent diversity in their backgrounds, ethnicities, cultures, and experiences. Peak Energy Technologies Inc. is an equal opportunity employer, aiming to reach our company’s full potential by cultivating an inclusive workforce. We do not discriminate on the basis of race, color, ancestry, religion, national origin, sexual orientation, citizenship, marital or family status, disability, gender identity or expression, veteran status, or any other legally protected status.

At Peak Energy Technologies Inc., we believe that a diverse and inclusive workplace makes us a more capable, innovative, and competitive company. We welcome people who represent diversity in their backgrounds, ethnicities, cultures, and experiences. Peak Energy Technologies Inc. is an equal opportunity employer, aiming to reach our company’s full potential by cultivating an inclusive workforce. We do not discriminate on the basis of race, color, ancestry, religion, national origin, sexual orientation, citizenship, marital or family status, disability, gender identity or expression, veteran status, or any other legally protected status.

About the Company:

Peak Energy is the first American venture to advance globally proven Sodium-Ion battery systems as the storage standard for the new era of renewable energy on a resilient grid. 

Sodium-Ion is cheap, readily available and safe, making it the leading contender in a rapidly evolving market.   

Our leadership team is powered by decades of expertise in scaling gigawatt-level innovation at world-class companies such as Tesla, Northvolt, SunPower, Fluence, and Enovix. We are backed by strategic investment and product partners such as TDK Ventures and Eclipse Ventures.  

We are a team of engineers, operators, entrepreneurs, and partners driven by a shared ambition to set the new performance standard for renewable energy and grid resilience. 

Embedded Software Engineer, ESS 

Location: Burlingame, CA (Onsite) 

Department: ESS Engineering 

Position Type: Contractor (6-12 months)

About the Job  

Peak Energy is seeking an experienced Embedded Software Engineer to join our Energy Storage Systems (ESS) team and work on the development of our gigawatt-scale sodium ion energy storage system.  

Responsibilities:  

• Design and implement real-time, C++, RTOS-based firmware targeting microcontrollers. 

• Understand, code, and use microcontroller hardware to meet functional safety requirements. 

• Create firmware for embedded prototypes to validate hardware design choices and accelerate firmware development. 

• Verify and support the integration of your code. 

• Assist with the definition of requirements. 

• Support products deployed to the field. 

• Participate in hardware and software design reviews. 

• Adhere to modern disciplined development practices such as Clang-based linting, consistent formatting, thoughtful naming, and clear commenting. 

Qualifications:  

• Have shipped at least one commercial or industrial hardware product.  

• A degree in science, engineering, or a related field.  

• 5+ years of professional engineering experience.  

• Experience writing firmware for real-time embedded systems.  

• Experience designing complex software that coordinates several disparate functions. 

• Experience using Linux as a development environment and test platform. 

• Experience configuring build tools such as CMake/Make. 

• A preference for using a debugger to understand the behavior of code at runtime.  

• An understanding of when to reach for an oscilloscope or other test equipment to verify your work.  

• Experience with Git, GitHub, Earthly, Docker, or similar CI tools. 

• Eligibility to work in the United States.  

About the Company 

Peak Energy is the first American venture to advance globally proven Sodium-Ion battery systems as the storage standard for the new era of renewable energy on a resilient grid. 

Sodium-Ion is cheap, readily available, and safe, making it the leading contender in a rapidly evolving market.  

Our leadership team is powered by decades of expertise in scaling gigawatt-level innovation at world-class companies such as Tesla, Northvolt, SunPower, Fluence, and Enovix. We are backed by strategic investment and product partners such as TDK Ventures and Eclipse Ventures.  

We are a team of engineers, operators, entrepreneurs, and partners driven by a shared ambition to set the new performance standard for renewable energy and grid resilience. 

Peak Energy Core Values  

• Speed Through Focus: Prioritize what matters most and execute quickly without distractions.  

• Mission Over Self: Put the company's mission and team success ahead of individual interests.  

• Face the Brutal Truth: Embrace honesty, even when it’s uncomfortable, to make informed decisions.  

• Be a Good Person: Treat everyone with respect and integrity, fostering a positive and ethical work environment.  

The hourly rate for this role is $150–$200 per hour, with actual pay varying based on work location, experience, and skills.

At Peak Energy Technologies Inc., we believe that a diverse and inclusive workplace makes us a more capable, innovative, and competitive company. We welcome people who represent diversity in their backgrounds, ethnicities, cultures, and experiences. Peak Energy Technologies Inc. is an equal opportunity employer, aiming to reach our company’s full potential by cultivating an inclusive workforce. We do not discriminate on the basis of race, color, ancestry, religion, national origin, sexual orientation, citizenship, marital or family status, disability, gender identity or expression, veteran status, or any other legally protected status. 

Embedded Software Engineer, ESS 

Location: Burlingame, CA (Onsite) 

Department: ESS Engineering 

Position Type: Full-time 

About the Job  

Peak Energy is seeking an experienced Embedded Software Engineer to join our Energy Storage Systems (ESS) team and work on the development of our gigawatt-scale sodium ion energy storage system.  

Responsibilities:  

• Design and implement real-time, C++, RTOS-based firmware targeting microcontrollers. 

• Understand, code, and use microcontroller hardware to meet functional safety requirements. 

• Create firmware for embedded prototypes to validate hardware design choices and accelerate firmware development. 

• Verify and support the integration of your code. 

• Assist with the definition of requirements. 

• Support products deployed to the field. 

• Participate in hardware and software design reviews. 

• Adhere to modern disciplined development practices such as Clang-based linting, consistent formatting, thoughtful naming, and clear commenting. 

Qualifications:  

• Have shipped at least one commercial or industrial hardware product.  

• A degree in science, engineering, or a related field.  

• 5+ years of professional engineering experience.  

• Experience writing firmware for real-time embedded systems.  

• Experience designing complex software that coordinates several disparate functions. 

• Experience using Linux as a development environment and test platform. 

• Experience configuring build tools such as CMake/Make. 

• A preference for using a debugger to understand the behavior of code at runtime.  

• An understanding of when to reach for an oscilloscope or other test equipment to verify your work.  

• Experience with Git, GitHub, Earthly, Docker, or similar CI tools. 

• Eligibility to work in the United States.  

About the Company 

Peak Energy is the first American venture to advance globally proven Sodium-Ion battery systems as the storage standard for the new era of renewable energy on a resilient grid. 

Sodium-Ion is cheap, readily available, and safe, making it the leading contender in a rapidly evolving market.  

Our leadership team is powered by decades of expertise in scaling gigawatt-level innovation at world-class companies such as Tesla, Northvolt, SunPower, Fluence, and Enovix. We are backed by strategic investment and product partners such as TDK Ventures and Eclipse Ventures.  

We are a team of engineers, operators, entrepreneurs, and partners driven by a shared ambition to set the new performance standard for renewable energy and grid resilience. 

Peak Energy Core Values  

• Speed Through Focus: Prioritize what matters most and execute quickly without distractions.  

• Mission Over Self: Put the company's mission and team success ahead of individual interests.  

• Face the Brutal Truth: Embrace honesty, even when it’s uncomfortable, to make informed decisions.  

• Be a Good Person: Treat everyone with respect and integrity, fostering a positive and ethical work environment.  

The salary range for this role is $160,000 - $240,000, with actual pay varying based on work location, experience, and skills.  Our competitive benefits package includes flexible PTO, comprehensive medical, dental, and vision coverage, a strong 401(k) plan, and equity opportunities. Join us to thrive in a supportive environment while making a meaningful impact on the energy sector!  

At Peak Energy Technologies Inc., we believe that a diverse and inclusive workplace makes us a more capable, innovative, and competitive company. We welcome people who represent diversity in their backgrounds, ethnicities, cultures, and experiences. Peak Energy Technologies Inc. is an equal opportunity employer, aiming to reach our company’s full potential by cultivating an inclusive workforce. We do not discriminate on the basis of race, color, ancestry, religion, national origin, sexual orientation, citizenship, marital or family status, disability, gender identity or expression, veteran status, or any other legally protected status.